Log when an import is being skipped because we already have it

Behavior Changes:
* Those pubkeys being imported with add_keypool set and are already in the wallet will no longer be added to the keypool

Author: achow101

src/wallet/wallet.cpp

@@ -1665,7 +1665,12 @@ bool CWallet::ImportScripts(const std::set<CScript> scripts)
 {
     WalletBatch batch(*database);
     for (const auto& entry : scripts) {
-        if (!HaveCScript(CScriptID(entry)) && !AddCScriptWithDB(batch, entry)) {
+        CScriptID id(entry);
+        if (HaveCScript(id)) {
+            WalletLogPrintf("Already have script %s, skipping\n", HexStr(entry));
+            continue;
+        }
+        if (!AddCScriptWithDB(batch, entry)) {
             return false;
         }
     }
@@ -1680,9 +1685,14 @@ bool CWallet::ImportPrivKeys(const std::map<CKeyID, CKey>& privkey_map, const in
         CPubKey pubkey = key.GetPubKey();
         const CKeyID& id = entry.first;
         assert(key.VerifyPubKey(pubkey));
+        // Skip if we already have the key
+        if (HaveKey(id)) {
+            WalletLogPrintf("Already have key with pubkey %s, skipping\n", HexStr(pubkey));
+            continue;
+        }
         mapKeyMetadata[id].nCreateTime = timestamp;
         // If the private key is not present in the wallet, insert it.
-        if (!HaveKey(id) && !AddKeyPubKeyWithDB(batch, key, pubkey)) {
+        if (!AddKeyPubKeyWithDB(batch, key, pubkey)) {
             return false;
         }
         UpdateTimeFirstKey(timestamp);
@@ -1703,7 +1713,12 @@ bool CWallet::ImportPubKeys(const std::vector<CKeyID>& ordered_pubkeys, const st
         }
         const CPubKey& pubkey = entry->second;
         CPubKey temp;
-        if (!GetPubKey(id, temp) && !AddWatchOnlyWithDB(batch, GetScriptForRawPubKey(pubkey), timestamp)) {
+        if (GetPubKey(id, temp)) {
+            // Already have pubkey, skipping
+            WalletLogPrintf("Already have pubkey %s, skipping\n", HexStr(temp));
+            continue;
+        }
+        if (!AddWatchOnlyWithDB(batch, GetScriptForRawPubKey(pubkey), timestamp)) {
             return false;
         }
         mapKeyMetadata[id].nCreateTime = timestamp;